If your fish dont mind it it shoudn't be a problem. Though if your growing plants your pushing alot of dissolved co2 out the tank. So there may be an issue with o2/co2 balance.
My fish just love my airstone as well! They play in it all the time I was told though that once you have them you need to keep them in as the fish get used to the increased o2 levels. Anyone know if this is true?